As air is pumped from the vacuum jar the sound level of the ringing bell will decrease until it can no longer be heard. This happens because air must be present in the jar in order for

a) sound to be transferred

b) electricity to flow through the wires

c) the rubber to seal the jar

d) the bell clanger to vibrate

Question

Physics

Dodson

22 September, 19:41

As air is pumped from the vacuum jar the sound level of the ringing bell will decrease until it can no longer be heard. This happens because air must be present in the jar in order for

a) sound to be transferred

b) electricity to flow through the wires

c) the rubber to seal the jar

d) the bell clanger to vibrate

+4

Answers (1)

Know the Answer?

Troy Fisher · Answer 1

As air is pumped from the vacuum jar the sound level of the ringing bell

will decrease until it can no longer be heard.

This happens because air must be present in the jar in order for sound

to be transferred. (a)